Method for controlling screen of mobile terminal, and apparatus

ABSTRACT

A method includes obtaining, by a mobile terminal, a motion parameter of the mobile terminal, determining whether the motion parameter meets a pick-up parameter threshold or a put-down parameter threshold, determining that the mobile terminal is picked up when the motion parameter meets the pick-up parameter threshold, obtaining a sight line parameter of a user, and switching the screen to an on state when a visual center of the user is on a screen of the mobile terminal and the screen is in an off state.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a U.S. National Stage of International PatentApplication No. PCT/CN2016/098601 filed on Sep. 9, 2016, which is herebyincorporated by reference in its entirety.

TECHNICAL FIELD

The present invention relates to the field of communicationstechnologies, and in particular, to a method for controlling a screen ofa mobile terminal, and an apparatus.

BACKGROUND

With continuous development of communications technologies, more usersuse mobile terminals. Generally, before using a mobile terminal, a userneeds to turn on a screen of the mobile terminal, and may turn off thescreen of the mobile terminal after stopping using the mobile terminal.

Currently, it may be detected whether a location of the mobile terminalchanges, to determine whether the user needs to use or stop using themobile terminal. Specifically, when the location of the mobile terminalchanges, it is considered that the user needs to use or stop using themobile terminal. Then, a status of the screen of the mobile terminal isdetermined. When the screen of the mobile terminal is in an off state,turn on the screen of the mobile terminal, or when the screen of themobile terminal is in an on state, turn off the screen of the mobileterminal.

However, because when the location of the mobile terminal changes, itdoes not necessarily mean that the user needs to use or stop using themobile terminal, accuracy of controlling, by using the foregoing method,a screen of a mobile terminal to be turned on or turned off isrelatively low.

SUMMARY

This application provides a method for controlling a screen of a mobileterminal, and an apparatus, to resolve a prior-art problem of relativelylow accuracy of controlling a screen of a mobile terminal to be turnedon or turned off.

To achieve the foregoing objective, the following technical solutionsare used in this application.

According to a first aspect, a method for controlling a screen of amobile terminal is provided. The method includes: obtaining a currentmotion parameter that is of a mobile terminal and that is used todetermine whether the mobile terminal is picked up or put down;determining, when the motion parameter meets a pick-up parameterthreshold, that the mobile terminal is picked up; after it is determinedthat the mobile terminal is picked up, obtaining a sight line parameterof a user that is used to determine whether a visual center of the useris on a screen of the mobile terminal; and when it is determined thatthe visual center of the user is on the screen and the screen is in anoff state, switching the screen to an on state.

In this application, because it may be determined, based on a motionstatus parameter of the mobile terminal. Whether the mobile terminal ispicked up by the user, and it may be further determined, by using thesight line parameter, whether the visual center of the user is on thescreen, it may be accurately determined whether the user needs to usethe mobile terminal, to accurately control the screen of the mobileterminal to be in the on state, so that accuracy of controlling thescreen of the mobile terminal to be turned on can be improved.

In a first optional implementation of the first aspect the method forcontrolling a screen of a mobile terminal in this application furtherincludes: when the current motion parameter of the mobile terminal meetsa put-down parameter threshold, determining that the mobile terminal isput down; obtaining a sight line parameter of the user after it isdetermined that the mobile terminal is put down; and when it isdetermined that the visual center of the user is not on the screen ofthe mobile terminal and the screen is in the on state, switching thescreen to the off state.

In this application, because it may be determined, based on the motionstatus parameter of the mobile terminal, whether the mobile terminal isput down by the user, and it may be further determined, by using thesight line parameter, whether the visual center of the user is on thescreen, it may be accurately determined whether the user stops using themobile terminal, to accurately control the screen of the mobile terminalto be in the off state, so that accuracy of controlling the screen ofthe mobile terminal to be turned off can be improved.

In a second optional implementation of the first aspect, the method forswitching the screen (namely, the screen of the mobile terminal) to theoff state includes: first, switching the screen to a dimmed state; thenobtaining a sight line parameter of the user; and when it is determinedthat the visual center of the user is constantly not on the screenwithin a preset hysteresis time, switching the screen to the off stateafter the hysteresis time.

In this application, when the screen of the mobile terminal needs to beswitched from the on state to the off state, to further improve accuracyof controlling the screen of the mobile terminal to be turned off, thescreen of the mobile terminal first may be switched to the dimmed stateand remain in the dimmed state for a time period (for example, thepreset hysteresis time), and the sight line parameter of the user may beconstantly obtained within the hysteresis time, to determine whether thevisual center of the user is on the screen of the mobile terminal. If itis determined that the visual center of the user is constantly not onthe screen of the mobile terminal within the hysteresis time, itindicates that the user needs to stop using the mobile terminal, and thescreen of the mobile terminal may be switched from the dimmed state tothe off state after the hysteresis time.

In a third optional implementation of the first aspect, the method forcontrolling a screen of a mobile terminal in this application furtherincludes: when it is determined that the visual center of the user isnot on the screen of the mobile terminal and the screen is in the onstate, switching the screen to the dimmed state; obtaining a sight lineparameter of the user; and when it is determined that the visual centerof the user is back on the screen within the preset hysteresis time,switching the screen to the on state.

In this application, when the screen of the mobile terminal needs to beswitched from the on state to the off state, to further improve accuracyof controlling the screen of the mobile terminal to be turned off, thescreen of the mobile terminal first may be switched to the dimmed stateand remain in the dimmed state for a time period (for example, thepreset hysteresis time), and the sight line parameter of the user may beconstantly obtained within the hysteresis time. If it is determined thatthe visual center of the user is back on the screen of the mobileterminal within the preset hysteresis time, it indicates that the userneeds to continue to use the mobile terminal, and the screen of themobile terminal may be directly switched from the dimmed state to the onstate.

In a fourth optional implementation of the first aspect, after theobtaining a current motion parameter of a mobile terminal, the methodfor controlling a screen of a mobile terminal in this applicationfurther includes: determining a current motion status of the mobileterminal based on the motion parameter; and determining, based on themotion status, the pick-up parameter threshold and the put-downparameter threshold that correspond to the motion status. The motionstatus includes a first motion state in which a moving speed of themobile terminal is A, a second motion state in which the moving speed ofthe mobile terminal is B, and a third motion state in which the movingspeed of the mobile terminal is C, where A<B<C.

In this application, because the mobile terminal may determine, based onthe motion parameter, the pick-up parameter threshold and the put-downparameter threshold that correspond to the motion status of the mobileterminal, the pick-up parameter threshold and the put-down parameterthreshold can be determined more accurately, so as to more accuratelydetermine whether the mobile terminal is picked up or put down.

In a fifth optional implementation of the first aspect, the method fordetermining, when the current motion parameter of the mobile terminalmeets a pick-up parameter threshold, that the mobile terminal is pickedup includes: when the motion parameter meets the pick-up parameterthreshold and it is determined that the screen of the mobile terminal isnot blocked, determining that the mobile terminal is picked up.

In this application, when the motion parameter meets the pick-upparameter threshold, to further improve accuracy of determining that themobile terminal is picked up, it may be further determined whether thescreen of the mobile terminal is blocked. If the screen of the mobileterminal is not blocked, it indicates that the user probably needs touse the mobile terminal, and it may be determined that the mobileterminal is picked up, or if the screen of the mobile terminal isblocked, it indicates that the user probably does not need to use themobile terminal, and the method for controlling a screen of a mobileterminal in the first aspect may be performed.

In a sixth optional implementation of the first aspect, the method forcontrolling a screen of a mobile terminal in this application furtherincludes: when the current motion parameter of the mobile terminal doesnot meet the pick-up parameter threshold and it is determined that thescreen of the mobile terminal is switched from being blocked to notbeing blocked, adjusting the pick-up parameter threshold; and when themotion parameter meets a pick-up parameter threshold obtained after theadjustment, determining that the mobile terminal is picked up.

That the screen of the mobile terminal is switched from being blocked tonot being blocked may be determined by using a result of determining, bythe mobile terminal, whether the screen of the mobile terminal iscurrently blocked and a result of previously determining, by the mobileterminal, whether the screen of the mobile terminal is blocked. Forexample, when the mobile terminal determines that the screen of themobile terminal is not blocked currently and the mobile terminalpreviously determines that the screen of the mobile terminal is blocked,the mobile terminal may determine that the screen of the mobile terminalis switched from being blocked to not being blocked.

In this application, if the mobile terminal determines that the screenof the mobile terminal is switched from being blocked to not beingblocked, it indicates that the user probably needs to use the mobileterminal. However, because the current motion parameter of the mobileterminal does not meet the current pick-up parameter threshold, tofurther improve accuracy of controlling the screen to be turned on, thecurrent pick-up parameter threshold may be adjusted appropriately, sothat the current motion parameter of the mobile terminal can meet thepick-up parameter threshold obtained after the adjustment.

The method for adjusting the pick-up parameter threshold may include:increasing a first angle range in the current pick-up parameterthreshold, and/or decreasing a first moving speed threshold in thecurrent pick-up parameter threshold, and/or decreasing a first movingheight threshold in the current pick-up parameter threshold.

In a seventh optional implementation of the first aspect, the method forcontrolling a screen of a mobile terminal in this application furtherincludes: when the current motion parameter of the mobile terminal doesnot meet the pick-up parameter threshold and it is determined that thescreen of the mobile terminal is not switched from being blocked to notbeing blocked and that the mobile terminal is switched from not beingheld to being held, determining that the mobile terminal is picked up.

In this application, when the motion parameter of the mobile terminaldoes not meet the pick-up parameter threshold obtained after theadjustment, or the screen of the mobile terminal is not switched frombeing blocked to not being blocked, to further improve accuracy ofcontrolling the screen to be turned on, the mobile terminal may furtherdetermine whether the mobile terminal is switched from not being held tobeing held, to determine whether the user needs to use the mobileterminal. If the mobile terminal determines that the mobile terminal isswitched from not being held to being held, it indicates that the userprobably needs to use the mobile terminal, or if the mobile terminaldetermines that the mobile terminal is not switched from not being heldto being held, it indicates that the user probably does not need to usethe mobile terminal.

In an eighth optional implementation of the first aspect, that themobile terminal is switched from not being held to being held may bedetermined by using the following method: obtaining at least two sensingparameter values that are used to determine whether the mobile terminalis held; calculating an eigenvalue of the at least two sensing parametervalues based on the at least two sensing parameter values; and when theeigenvalue is greater than or equal to a holding decision threshold, andthe eigenvalue obtained after previous calculation is less than theholding decision threshold, determining that the mobile terminal isswitched from not being held to being held.

The at least two sensing parameter values may be obtained by using atleast two sensing units disposed in the mobile terminal. During hardwareimplementation, the at least two sensing units may be disposed on twosides of a rear face of the mobile terminal. In one possibleimplementation, a plurality of sensing units may be separately disposedat intervals on the two sides of the rear face of the mobile terminal(when two sensing units are disposed in the mobile terminal, one sensingunit may be disposed on each of the two sides of the rear face of themobile terminal). The sensing unit may be implemented by a capacitivesensor.

In this application, when the eigenvalue of the obtained at least twosensing parameter values is greater than or equal to the holdingdecision threshold, it may be determined that the mobile terminal isheld, and when the eigenvalue is less than the holding decisionthreshold, it may be determined that the mobile terminal is not held.Therefore, it may be determined whether the eigenvalue is greater thanor equal to the holding decision threshold, to determine whether themobile terminal is held.

In this application, it may be determined, with reference to arelationship between the holding decision threshold and the eigenvaluethat is of at least two sensing parameter values and that is obtainedafter previous calculation and a relationship between the holdingdecision threshold and the eigenvalue that is of at least two sensingparameter values and that is obtained after current calculation, whetherthe mobile terminal is switched from not being held to being held orswitched from being held to not being held. Specifically, when theeigenvalue obtained after current calculation of the mobile terminal isgreater than or equal to the holding decision threshold, and theeigenvalue obtained after previous calculation is less than the holdingdecision threshold (that is, the relationship between the eigenvalueobtained after current calculation and the holding decision threshold isdifferent from the relationship between the eigenvalue obtained afterprevious calculation and the holding decision threshold, for example,the eigenvalue obtained after previous calculation is less than theholding decision threshold, and the eigenvalue obtained after currentcalculation is greater than or equal to the holding decision threshold),the mobile terminal may determine that the mobile terminal is switchedfrom not being held to being held. Therefore, it can be accuratelydetermined that the user probably needs to use the mobile terminal.

Correspondingly, when the eigenvalue obtained after current calculationof the mobile terminal is less than the holding decision threshold andthe eigenvalue obtained after previous calculation is greater than orequal to the holding decision threshold, the mobile terminal maydetermine that the mobile terminal is switched from being held to notbeing held.

In a ninth optional implementation of the first aspect, the method forcontrolling a screen of a mobile terminal in this application furtherincludes: when the current motion parameter of the mobile terminal doesnot meet the put-down parameter threshold and it is determined that themobile terminal is switched from being held to not being held,determining that the mobile terminal is put down.

In this application, when the motion parameter of the mobile terminaldoes not meet the put-down parameter threshold, to further improveaccuracy of controlling the screen to be turned off, the mobile terminalmay further determine whether the mobile terminal is switched from beingheld to not being held, to determine whether the user needs to use themobile terminal. If the mobile terminal determines that the mobileterminal is switched from being held to not being held, it indicatesthat the user probably does not need to use the mobile terminal, and itis determined that the mobile terminal is put down or if the mobileterminal determines that the mobile terminal is not switched from beingheld to not being held, it indicates that the user needs to use themobile terminal.

In a tenth optional implementation of the first aspect, the method forobtaining a sight line parameter of the user after it is determined thatthe mobile terminal is put down includes: obtaining the sight lineparameter of the user after it is determined that the mobile terminal isput down and that the screen of the mobile terminal is not blocked.

In this application, after it is determined that the mobile terminal isput down, to further improve accuracy of controlling the screen to beturned off, it may be determined whether the screen of the mobileterminal is blocked and when it is determined that the screen of themobile terminal is blocked, it is determined that the user does not needto use the mobile terminal, so that the screen of the mobile terminalcan be directly switched to the off state without a need to obtain thesight line parameter of the user. Therefore, power consumption of themobile terminal can be further reduced. Alternatively, when it isdetermined that the screen of the mobile terminal is not blocked, thescreen of the mobile terminal first may be switched to the dimmed stateand remain in the dimmed state for the time period (for example, thepreset hysteresis time), and the sight line parameter of the user may beconstantly obtained within the hysteresis time, to determine whether thevisual center of the user is on the screen of the mobile terminal. If itis determined that the visual center of the user is constantly not onthe screen of the mobile terminal within the hysteresis time, itindicates that the user needs to stop using the mobile terminal, and thescreen of the mobile terminal may be switched from the dimmed state tothe off state after the hysteresis time.

According to a second aspect, a mobile terminal is provided. The mobileterminal includes an obtaining module, a determining module, and aswitching module. The obtaining module is configured to obtain a currentmotion parameter that is of the mobile terminal and that is used todetermine whether the mobile terminal is picked up or put down, andconfigured to: after the determining module determines that the mobileterminal is picked up, obtain a sight line parameter of a user that isused to determine whether a visual center of the user is on a screen ofthe mobile terminal; the determining module is configured to: when themotion parameter obtained by the obtaining module meets a pick-upparameter threshold, determine that the mobile terminal is picked up;and the switching module is configured to: when it is determined thatthe visual center of the user is on the screen of the mobile terminaland the screen is in an off state, switch the screen to an on state.That the visual center of the user is on the screen is determined byusing the sight line parameter of the user obtained by the obtainingmodule.

In a first optional implementation of the second aspect, in the mobileterminal in this application, the determining module is furtherconfigured to: when the current motion parameter of the mobile terminalmeets a put-down parameter threshold, determine that the mobile terminalis put down; the obtaining module is further configured to obtain asight line parameter of the user after the determining module determinesthat the mobile terminal is put down; and the switching module isfurther configured to: when it is determined that the visual center ofthe user is not on the screen of the mobile terminal and the screen isin the on state, switch the screen to the off state. That the visualcenter of the user is not on the screen is determined by using the sightline parameter of the user obtained by the obtaining module.

In a second optional implementation of the second aspect, in the mobileterminal in this application, the switching module is specificallyconfigured to: switch the screen of the mobile terminal to a dimmedstate; instruct the obtaining module to obtain a sight line parameter ofthe user; when it is determined that the visual center of the user isconstantly not on the screen within a preset hysteresis time, switch thescreen to the off state after the hysteresis time.

In a third optional implementation of the second aspect; in the mobileterminal in this application, the switching module is further configuredto: when it is determined that the visual center of the user is not onthe screen of the mobile terminal and the screen is in the on state,switch the screen to the dimmed state; instruct the obtaining module toobtain a sight line parameter of the user; and when it is determinedthat the visual center of the user is back on the screen within thehysteresis time, switch the screen to the on state.

In a fourth optional implementation of the second aspect, in the mobileterminal in this application, the determining module is furtherconfigured to: after the obtaining module obtains the current motionparameter of the mobile terminal, determine a current motion status ofthe mobile terminal based on the motion parameter obtained by theobtaining module; determine, based on the motion status, the pick-upparameter threshold and the put-down parameter threshold that correspondto the motion status, where the motion status includes a first motionstate in which a moving speed of the mobile terminal is A, a secondmotion state in which the moving speed of the mobile terminal is B, anda third motion state in which the moving speed of the mobile terminal isC, where A<B<C.

In a fifth optional implementation of the second aspect, in the mobileterminal in this application, the determining module is specificallyconfigured to: when the current motion parameter of the mobile terminalobtained by the obtaining unit meets the pick-up parameter threshold andit is determined that the screen is not blocked, determine that themobile terminal is picked up.

In a sixth optional implementation of the second aspect, the mobileterminal in this application further includes an adjustment module,where the adjustment module is configured to: when the current motionparameter of the mobile terminal obtained by the obtaining module doesnot meet the pick-up parameter threshold and the determining moduledetermines that the screen of the mobile terminal is switched from beingblocked to not being blocked, adjust the pick-up parameter threshold;and the determining module is specifically configured to: when themotion parameter obtained by the obtaining module meets a pick-upparameter threshold obtained after the adjustment performed by theadjustment module, determine that the mobile terminal is picked up.

In a seventh optional implementation of the second aspect, in the mobileterminal in this application, the determining module is furtherconfigured to: when the current motion parameter of the mobile terminalobtained by the obtaining unit does not meet the pick-up parameterthreshold and it is determined that the screen of the mobile terminal isnot switched from being blocked to not being blocked and that the mobileterminal is switched from not being held to being held, determine thatthe mobile terminal is picked up.

In an eighth optional implementation of the second aspect, in the mobileterminal in this application, that the mobile terminal is switched fromnot being held to being held may be determined by the determiningmodule. The determining module is specifically configured to: instructthe obtaining module to obtain at least two sensing parameter valuesthat are used to determine whether the mobile terminal is held;calculate an eigenvalue of the at least two sensing parameter valuebased on the at least two sensing parameter values obtained by theobtaining module; and when the eigenvalue is greater than or equal to aholding decision threshold, and the eigenvalue obtained after previouscalculation is less than the holding decision threshold, determine thatthe mobile terminal is switched from not being held to being held.

In a ninth optional implementation of the second aspect, in the mobileterminal in this application, the determining module is furtherconfigured to: when the current motion parameter of the mobile terminalobtained by the obtaining module does not meet the put-down parameterthreshold and it is determined that the mobile terminal is switched frombeing held to not being held, determine that the mobile terminal is putdown.

In a tenth optional implementation of the second aspect, in the mobileterminal in this application, the obtaining module is specificallyconfigured to obtain the sight line parameter of the user after thedetermining module determines that the mobile terminal is put down andthat the screen of the mobile terminal is not blocked.

In the first aspect and the second aspect, the current motion parameterof the mobile terminal includes at least one of an angle, the movingspeed of the mobile terminal, or a moving height of the mobile terminal,and the angle is an angle between a plane of the screen of the mobileterminal and a plane of the eyes of the user. The pick-up parameterthreshold includes at least one of a first angle range, a first movingspeed threshold, or a first moving height threshold. The put-downparameter threshold includes at least one of a second angle range, asecond moving speed threshold, or a second moving height threshold. Thatthe current motion parameter of the mobile terminal meets the pick-upparameter threshold includes at least one of the following: the anglefalls within the first angle range, the moving speed is greater than orequal to the first moving speed threshold, or the moving height isgreater than or equal to the first moving height threshold. That thecurrent motion parameter of the mobile terminal meets the put-downparameter threshold includes at least one of the following: the anglefalls within the second angle range, the moving speed is greater than orequal to the second moving speed threshold, or the moving height isgreater than or equal to the second moving height threshold.

In this application, that the current motion parameter of the mobileterminal meets the pick-up parameter threshold may be determined bydetermining at least one of the following: the angle between the planeof the screen of the mobile terminal and the plane of the eyes of theuser is in the first angle range, the moving speed of the mobileterminal is greater than or equal to the first moving speed threshold,and that the moving height of the mobile terminal is greater than orequal to the first moving height threshold. In addition, that thecurrent motion parameter of the mobile terminal meets the put-downparameter threshold may be determined by determining at least one of thefollowing: the angle between the plane of the screen of the mobileterminal and the plane of the eyes of the user is in the second anglerange, the moving speed of the mobile terminal is greater than or equalto the second moving speed threshold, or the moving height of the mobileterminal is greater than or equal to the second moving height threshold.Therefore, it can be accurately determined whether the current motionparameter of the mobile terminal meets the pick-up parameter thresholdor the put-down parameter threshold.

In this application, the modules in the second aspect may be furtherconfigured to perform corresponding method steps in the first aspect. Inaddition, the second aspect may further include other modules configuredto perform other method steps in the first aspect.

For technical effects of the second aspect and the optionalimplementations of the second aspect, refer to the related descriptionsof the technical effects of the first aspect and the optionalimplementations of the first aspect, and details are not describedherein again.

According to a third aspect, this application provides a mobileterminal. The mobile terminal includes a processor, a transceiver, and amemory. The processor, the transceiver, and the memory are connected ina coupling manner by using a bus. The memory is configured to store acomputer execution instruction, and when the mobile terminal runs, theprocessor executes the computer execution instruction stored in thememory, so that the mobile terminal performs the method for controllinga screen of a mobile terminal in the first aspect and the optionalimplementations of the first aspect. For the specific method forcontrolling a screen of a mobile terminal, refer to the relateddescriptions in the first aspect and the optional implementations of thefirst aspect, and details are not described herein again.

According to a fourth aspect, this application provides a computerreadable storage medium. The computer readable storage medium stores oneor more programs. The one or more programs include a computer executioninstruction. When a processor of a mobile terminal executes the computerexecution instruction, the mobile terminal performs the method forcontrolling a screen of a mobile terminal in any one of the first aspectand the optional implementations of the first aspect. For the specificmethod for controlling a screen of a mobile terminal, refer to therelated descriptions in the first aspect and the optionalimplementations of the first aspect, and details are not describedherein again.

For technical effects of the third aspect and the fourth aspect, referto the related descriptions of the technical effects of the first aspectand the optional implementations of the first aspect, and details arenot described herein again.

BRIEF DESCRIPTION OF DRAWINGS

To describe the technical solutions in the embodiments of the presentinvention or in the prior art more clearly, the following brieflydescribes the accompanying drawings required for describing theembodiments or the prior art. Apparently, the accompanying drawings inthe following description show merely some embodiments of the presentinvention.

FIG. 1 is a schematic diagram of a system architecture of an Androidoperating system according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a hardware structure of a smartphoneaccording to an embodiment of the present invention;

FIG. 3 is a first schematic diagram of a method for controlling a screenof a mobile terminal according to an embodiment of the presentinvention;

FIG. 4A and FIG. 4B are a second schematic diagram of a method forcontrolling a screen of a mobile terminal according to an embodiment ofthe present invention;

FIG. 5 is a schematic diagram of at least sensing units according to anembodiment of the present invention;

FIG. 6 is a schematic diagram of a holding decision threshold accordingto an embodiment of the present invention;

FIG. 7A and FIG. 7B are a third schematic diagram of a method forcontrolling a screen of a mobile terminal according to an embodiment ofthe present invention;

FIG. 8 is a first schematic structural diagram of a mobile terminalaccording to an embodiment of the present invention;

FIG. 9 is a second schematic structural diagram of a mobile terminalaccording to an embodiment of the present invention; and

FIG. 10 is a third schematic structural diagram of a mobile terminalaccording to an embodiment of the present invention.

DESCRIPTION OF EMBODIMENTS

The term “and/or” in this specification describes only an associationrelationship for describing associated objects and represents that threerelationships may exist. For example, A and/or B may represent thefollowing three cases: Only A exists, both A and B exist, and only Bexists. The character “/” in this specification indicates an “or”relationship between the associated objects. For example, A/B indicatesA or B.

In the specification and claims of the present invention, the terms“first”, “second”, “third”, and the like are intended to distinguishbetween different objects but do not indicate a particular order of theobjects. For example, a first motion state, a second motion state, athird motion state, and the like are intended to distinguish betweendifferent motion states but do not indicate a particular order of themotion states.

The term “example” or “for example” in the embodiments of the presentinvention means used as an example, an illustration, or a description.Any embodiment or design scheme described as “example” or “for example”in the embodiments of the present invention should not be explained asbeing more preferred or having more advantages than another embodimentor design scheme. Exactly, use of the term “example” or “for example” isintended to present a concept in a specific manner.

In the descriptions of the present invention, unless otherwisespecified, “a plurality of” means at least two. For example, a pluralityof sensing units mean at least two sensing units.

The following clearly describes the technical solutions of theembodiments of the present invention with reference to the accompanyingdrawings in the embodiments of the present invention. Apparently, thedescribed embodiments are merely some but not all of the embodiments ofthe present invention.

First, some concepts that may be used in the embodiments of the presentinvention are described.

1. A status of a screen of a mobile terminal in the embodiments of thepresent invention is described. The status of the screen of the mobileterminal in the embodiments of the present invention includes an onstate, an off state, and a dimmed state.

The on state is also referred to as an awake state, and is a state inwhich luminance of the screen of the mobile terminal is presetluminance. The preset luminance may be set by a user, or may be set bythe mobile terminal by default. For example, in actual application, ifthe luminance of the screen of the mobile terminal is zero, when theuser needs to use the mobile terminal, the status of the screen of themobile terminal after the user presses a power key of the mobileterminal is the on state.

The off state is also referred to as a sleep state, and is a state inwhich the luminance of the screen of the mobile terminal is zero. Forexample; in actual application, when the user stops using the mobileterminal, the status of the screen of the mobile terminal after the userpresses the power key of the mobile terminal is the off state.

The dimmed state is a state of the screen in which the luminance of thescreen of the mobile terminal is between luminance of the screen in theon state and luminance of the screen in the off state. The dimmed stateis a transit state when the screen of the mobile terminal is to beswitched from the on state to the off state. For example, in actualapplication, after the user stops using the mobile terminal, if themobile terminal does not detect an operation of the user within a firstpreset time, the screen of the mobile terminal is first switched to thedimmed state after the first preset time; and if the mobile terminalstill does not detect an operation of the user within a second presettime, the screen of the mobile terminal is switched from the dimmedstate to the off state after the second preset time; or if the mobileterminal detects an operation of the user within a second preset time,the screen of the mobile terminal is switched from the dimmed state tothe on state.

2. A visual center in the embodiments of the present invention isdescribed.

The visual center is a center of a view of the user on a plane, namely,a location on which the user fixes his or her eyes on the plane.

Generally, when the user needs to use the mobile terminal, the userneeds to turn on the screen of the mobile terminal, and when the userstops using the mobile terminal, the user needs to turn off the screenof the mobile terminal. Currently, it is determined whether a locationof the mobile terminal changes, to determine whether the user needs touse or stop using the mobile terminal, so as to control the screen ofthe mobile terminal to be turned on or turned off. However, in actualapplication, when the location of the mobile terminal changes, it doesnot necessarily mean that the user needs to use or stop using the mobileterminal. As a result, according to the method, accuracy of controllingthe screen of the mobile terminal to be turned on or turned off isrelatively low.

To resolve the foregoing problem, the embodiments of the presentinvention provide a method for controlling a screen of a mobileterminal. In the method, it may be determined, based on a motionparameter of a mobile terminal (for example, a moving height and amoving speed of the mobile terminal, and an angle between a plane of ascreen of the mobile terminal and a plane of the eyes of the user),whether the mobile terminal is picked up or put down by the user, and itmay be further determined, by using a sight line parameter (for example,a parameter used to determine a visual center of the user), whether thevisual center of the user is on the screen, so as to accuratelydetermine whether the user needs to use the mobile terminal or stopusing the mobile terminal, and further accurately control the screen ofthe mobile terminal to be in an on state or an off state, so thataccuracy of controlling the screen of the mobile terminal to be turnedon or turned off can be improved.

The mobile terminal in the embodiments of the present invention may bean intelligent mobile terminal. The intelligent mobile terminal is amobile terminal having an operating system. The intelligent mobileterminal may be a terminal device such as a smartphone, a tabletcomputer, a notebook computer, an ultra-mobile personal computer(ultra-mobile personal computer, UMPC), a netbook, a personal digitalassistant (personal digital assistant, PDA), a smartwatch, or a smartband, or the intelligent mobile terminal may be an intelligent mobileterminal of another type. This is not specifically limited in theembodiments of the present invention.

The intelligent mobile terminal has an independent operating system. Forexample, the intelligent mobile terminal may have an Android operatingsystem, an iOS operating system, or another operating system. This isnot specifically limited in the present invention.

The following describes a system architecture of the Android operatingsystem by using the Android operating system as an example. FIG. 1 is aschematic diagram of a possible system architecture of the Androidoperating system. Specifically, in FIG. 1, the system architecture ofthe Android operating system includes four layers, namely, a kernellayer (which may be specifically a Linux kernel layer), a library andAndroid operating system runtime layer, an application framework layer,and an application layer.

The kernel layer is an operating system layer of the Android operatingsystem, is a bottom layer of Android operating system software layers,and provides a core system service based on a Linux kernel. In additionto the core system service, the kernel layer further provides a driverrelated to hardware of the intelligent mobile terminal, for example, acamera driver, a Bluetooth driver, a USB driver, a keyboard driver, anda Wi-Fi driver.

The library and Android operating system runtime layer is implemented byusing the C language and the C++ language, and is a middle layer of theAndroid operating system software layers. The library and Androidoperating system runtime layer includes two parts. One part is a library(also referred to as a system library), and mainly includes an interfacemanager, a media framework, data storage, a 3D engine, a bitmap andvector, a browser engine, a 2D graphics engine, an intermediateprotocol, and a Libc function library (a function library of the Clanguage). The other part is an Android operating system runtime, andincludes an Android runtime (Android runtime, ART) virtual machine and akernel library. The ART virtual machine is configured to run anapplication in the Android operating system based on the kernel library,and each application in the Android operating system has one ART virtualmachine that serves the application.

The application framework layer is actually a framework of anapplication, and a developer may develop another application whenconforming to an application framework developing rule. Some importantassemblies of the application framework layer include an activitymanager, a window manager, a memory provider, a view system, anotification manager, a package manager, a phone manager, a resourcemanager, local management, and an Extensible Messaging and PresenceProtocol (Extensible Messaging and Presence Protocol, XMPP) service.

The application layer is a set of applications in the Android operatingsystem. The Android operating system itself provides many systemapplications such as the home screen, the contacts, the phone, and thebrowser. In addition, an application developer may further developanother application by using the application framework layer, forexample, may install and run a third-party application on theintelligent mobile terminal.

The Android operating system is used as an example. In the embodimentsof the present invention, a program used to implement the method forcontrolling a screen of a mobile terminal in the embodiments of thepresent invention may be developed based on the system architecture ofthe Android operating system in FIG. 1.

The following specifically describes, with reference to FIG. 2 and whenthe mobile terminal in the embodiments of the present invention is asmartphone, constitution components of the smartphone.

As shown in FIG. 2, the smartphone includes components such as aprocessor 11, a radio frequency (radio frequency, RF) circuit 12, apower supply 13, a memory 14, an input unit 15, a display unit 16, andan audio circuit 17. A person skilled in the art may understand that astructure of the smartphone in FIG. 2 does not constitute a limitationon the smartphone, and may include more or fewer components than thoseshown in FIG. 2, or some components in the components shown in FIG. 2may be combined, or a component arrangement may be different from thatshown in FIG. 2.

The processor 11 is a control center of the smartphone, connects allparts of the smartphone by using various interfaces and lines, andperforms various functions of the smartphone and processes data byrunning or executing a software program and/or a module that are/isstored in the memory 14 and invoking data stored in the memory 14, so asto monitor the entire smartphone. Optionally, the processor 11 mayinclude one or more processing units. Preferably, the processor 11 mayintegrate an application processor and a modem processor. Theapplication processor mainly processes an operating system, a userinterface, an application, and the like. The modem processor mainlyprocesses radio communication. It may be understood that the modemprocessor may not be integrated into the processor 11.

The RF circuit 12 may be configured to receive and send signals in aninformation receiving and sending process or a call process.Particularly, the RF circuit receives downlink information from a basestation, then sends the downlink information to the processor 11 forprocessing, and sends uplink data to the base station. Generally, the RFcircuit includes but is not limited to: an antenna, at least oneamplifier, a transceiver, a coupler, a low noise amplifier (low noiseamplifier, LNA), and a duplexer. In addition, the RF circuit 12 mayfurther communicate with a network and another device through wirelesscommunication. The wireless communication may use any communicationstandard or protocol, including but not limited to: Global System forMobile Communications (Global System for Mobile Communications, GSM),general packet radio service (General Packet Radio Service, GPRS), codedivision multiple access (Code Division Multiple Access, CDMA), WidebandCode Division Multiple Access (Wideband Code Division Multiple Access,WCDMA), Long Term Evolution (Long Term Evolution, LTE), e-mail, andshort messaging service (Short Messaging Service, SMS).

The smartphone includes a power supply 13 (for example, a battery) forsupplying power to the components. Preferably, the power supply mayconnect to the processor 11 logically by using a power managementsystem, to implement functions such as charging management, dischargingmanagement, and power consumption management by using the powermanagement system.

The memory 14 may be configured to store a software program and amodule, and the processor 11 runs the software program and the modulethat are stored in the memory 14, to perform various functionapplications of the smartphone and data processing. The memory 14 maymainly include a program storage area and a data storage area. Theprogram storage area may store an operating system, an applicationrequired by at least one function (such as a sound playback function andan image play function), and the like. The data storage area may storedata (such as audio data, image data, and an address book) created basedon use of the smartphone. In addition, the memory 14 may include ahigh-speed random access memory, or may include a non-volatile memory,for example, at least one magnetic disk storage component, a flashmemory, or another volatile solid-state storage component.

The input unit 15 may be configured to: receive input digit or characterinformation, and generate key signal input related to user setting andfunction control of the smartphone. Specifically, the input unit 15 mayinclude a touchscreen 151 and another input device 152. The touchscreen151, also referred to as a touch panel, may obtain a touch operation(such as an operation of a user on or near the touchscreen 151 by usingany suitable object or accessory such as a finger or a stylus) of theuser on or near the touchscreen, and drive a corresponding connectionapparatus according to a preset program. Optionally, the touchscreen 151may include a touch detection apparatus and a touch controller. Thetouch detection apparatus detects a touch position of the user, detectsa signal generated by the touch operation, and sends the signal to thetouch controller. The touch controller receives touch information fromthe touch detection apparatus, converts the touch information into touchpoint coordinates, and sends the touch point coordinates to theprocessor 11. Moreover, the touch controller can receive a command fromthe processor 11, and execute the command. In addition, the touchscreen151 may be a resistive touchscreen, a capacitive touchscreen, aninfrared touchscreen, a surface wave sound touchscreen, or the like. Inaddition to the touchscreen 151, the input unit 15 may further includeanother input device 152. Specifically, the another input device 152 mayinclude but is not limited to one or more of a physical keyboard, afunction key (such as a volume control key or a power key), a trackball, a mouse, or a joystick.

The display unit 16 may be configured to display information entered bythe user or information provided for the user, and various menus of thesmartphone. The display unit 16 may include a display panel 161.Optionally, the display panel 161 may be configured by using a liquidcrystal display (liquid crystal display, LCD), an organic light-emittingdiode (organic light-emitting diode, OLED), or the like. Further, thetouchscreen 151 may cover the display panel 161. After detecting a touchoperation on or near the touchscreen 151, the touchscreen 151 sends thetouch operation to the processor 11, to determine a type of a touchevent. Then, the processor 11 provides a corresponding visual output onthe display panel 161 based on the type of the touch event. Although inFIG. 2, the touchscreen 151 and the display panel 161 are used as twoindependent components to implement input and output functions of thesmartphone, in some embodiments, the touchscreen 151 and the displaypanel 161 may be integrated to implement the input and output functionsof the smartphone.

The audio circuit 17, a loudspeaker 171, and a microphone 172 areconfigured to provide an audio interface between the user and thesmartphone. The audio circuit 17 may convert received audio data into anelectrical signal, and transmit the electrical signal to the loudspeaker171. The loudspeaker 171 converts the electrical signal into a soundsignal and outputs the sound signal. In another aspect, the microphone172 converts an obtained sound signal into an electrical signal, and theaudio circuit 17 receives the electrical signal and converts theelectrical signal into audio data, and outputs the audio data to the RFcircuit 12, so that the RF circuit 12 sends the audio data to anothermobile phone, or transmits the audio data to the memory 14 for furtherprocessing.

The smartphone may further include sensors such as a gyroscope sensor, ahydrometer sensor, an infrared sensor, and a magnetometer sensor, anddetails are not described herein.

Although not shown, the smartphone may further include a wirelessfidelity (wireless fidelity, Wi-Fi) module, a Bluetooth module, and thelike. Details are not described herein.

To better understand the method for controlling a screen of a mobileterminal in the embodiments of the present invention, the method isdescribed in the following method embodiments by way of example by usinga mobile terminal as an execution body. In actual application, themethod for controlling a screen of a mobile terminal in the embodimentsof the present invention may be alternatively performed by a logicalfunctional unit and/or module that can implement the method in themobile terminal.

An embodiment of the present invention provides a method for controllinga screen of a mobile terminal. As shown in FIG. 3, the method mayinclude the following steps.

S101. A mobile terminal obtains a current motion parameter of the mobileterminal.

The motion parameter may be used to determine whether the mobileterminal is picked up or put down.

S102. The mobile terminal determines whether the motion parameter meetsa pick-up parameter threshold or a put-down parameter threshold.

Further, in this embodiment of the present invention, when the motionparameter meets the pick-up parameter threshold, the mobile terminal mayperform steps S103 to S105, or when the motion parameter meets theput-down parameter threshold, the mobile terminal may perform steps S106to S108.

It should be noted that in this embodiment of the present invention, inaddition to the case in which the motion parameter meets the pick-upparameter threshold and the case in which the motion parameter meets theput-down parameter threshold, a case in which the motion parameter meetsneither the pick-up parameter threshold nor the put-down parameterthreshold may be further included. When the motion parameter meetsneither the pick-up parameter threshold nor the put-down parameterthreshold, the mobile terminal may continue to perform S101.

Optionally, in this embodiment of the present invention, the motionparameter may include at least one of an angle, a moving speed of themobile terminal (which may be specifically a speed of the mobileterminal moved by the user), or a moving height of the mobile terminal(which may be specifically a height of the mobile terminal moved by theuser). The angle may be an angle between a plane of a screen and a planeof the eyes of the user.

Correspondingly, the pick-up parameter threshold may include at leastone of a first angle range, a first moving speed threshold, or a firstmoving height threshold. The put-down parameter threshold may include atleast one of a second angle range, a second moving speed threshold, or asecond moving height threshold.

With reference to the motion parameter, the pick-up parameter threshold,and the put-down parameter threshold that are described above, in thisembodiment of the present invention, that the motion parameter meets thepick-up parameter threshold may include at least one of the following:The angle falls within the first angle range; the moving speed isgreater than or equal to the first moving speed threshold; or the movingheight is greater than or equal to the first moving height threshold.That the motion parameter meets the put-down parameter threshold mayinclude at least one of the following: The angle falls within the secondangle range; the moving speed is greater than or equal to the secondmoving speed threshold; or the moving height is greater than or equal tothe second moving height threshold.

S103. The mobile terminal determines that the mobile terminal is pickedup.

In this embodiment of the present invention, after determining that themobile terminal is picked up, the mobile terminal may perform step S104.

S104. The mobile terminal obtains a sight line parameter of a user.

The sight line parameter of the user is used to determine whether avisual center of the user is on the screen of the mobile terminal.

Optionally, in this embodiment of the present invention, the sight lineparameter of the user may be obtained by using either of the followingtwo methods.

In one method, a facial image of the user is collected by using a cameraembedded into the mobile terminal, and the facial image of the user isanalyzed, to obtain the sight line parameter of the user, so as todetermine whether the visual center of the user is on the screen of themobile terminal.

In the other method, eye tracking is performed on the user by using acamera or an eye tracking unit embedded into the mobile terminal, toobtain the sight line parameter of the user, so as to determine whetherthe visual center of the user is on the screen of the mobile terminal.

S105. When determining that a visual center of the user is on a screenand the screen is in an off state, the mobile terminal switches thescreen to an on state.

In this embodiment of the present invention, the mobile terminal mayswitch the screen of the mobile terminal to the on state, that is,control the screen of the mobile terminal to be turned on, whendetermining that the mobile terminal is picked up and that the visualcenter of the user is on the screen of the mobile terminal, and acurrent status of the screen of the mobile terminal is the off state.

It should be noted that the mobile terminal may keep a status of thescreen of the mobile terminal unchanged when determining that the mobileterminal is picked up and that the visual center of the user is on thescreen of the mobile terminal, and the current status of the screen ofthe mobile terminal is the on state.

Optionally, in this embodiment of the present invention, the status ofthe screen of the mobile terminal may be obtained by the mobile terminalthrough determining. Specifically, the mobile terminal may determine thestatus of the screen of the mobile terminal in real time, or maydetermine the status of the screen of the mobile terminal at aparticular time before the status of the screen of the mobile terminalis switched, and this is not limited in the present invention.

S106. The mobile terminal determines that the mobile terminal is putdown.

In this embodiment of the present invention, after determining that themobile terminal is put down, the mobile terminal may perform step S107.

S107. The mobile terminal obtains a sight line parameter of a user.

For specific descriptions of S107, refer to the related descriptions ofS104, and details are not described herein again.

S108. When determining that a visual center of the user is not on ascreen and the screen is in an on state, the mobile terminal switchesthe screen to an off state.

In this embodiment of the present invention, the mobile terminal mayswitch the status of the screen of the mobile terminal to the off state,that is, control the screen of the mobile terminal to be turned off,when determining that the mobile terminal is put down and that thevisual center of the user is not on the screen of the mobile terminal,and the current status of the screen of the mobile terminal is the onstate.

It should be noted that the mobile terminal may keep the status of thescreen of the mobile terminal unchanged when determining that the mobileterminal is put down and that the visual center of the user is not onthe screen of the mobile terminal, and the current status of the screenof the mobile terminal is the off state.

In the method for controlling a screen of a mobile terminal in thisembodiment of the present invention, the mobile terminal obtains thecurrent motion parameter of the mobile terminal, determines whether themotion parameter meets the pick-up parameter threshold or the put-downparameter threshold, determines, when the motion parameter meets thepick-up parameter threshold, that the mobile terminal is picked up,obtains the sight line parameter of the user, and switches the screen tothe on state when determining that the visual center of the user is onthe screen of the mobile terminal and the screen is in the off state.When the motion parameter meets the put-down parameter threshold, themobile terminal determines that the mobile terminal is put down, obtainsthe sight line parameter of the user, and switches the screen to the offstate when determining that the visual center of the user is not on thescreen and the screen is in the on state. In other words, in thisembodiment of the present invention, it may be determined, based on amotion status parameter of the mobile terminal, whether the mobileterminal is picked up or put down by the user, and it may be furtherdetermined, by using the sight line parameter, whether the visual centerof the user is on the screen, so that it may be accurately determinedwhether the user needs to use the mobile terminal or stop using themobile terminal, to accurately control the screen of the mobile terminalto be in the on state or the off state. Therefore, accuracy ofcontrolling the screen of the mobile terminal to be turned on or turnedoff can be improved.

In actual application, the method for controlling a screen of a mobileterminal in the embodiments of the present invention may be applied totwo scenarios (namely, a first scenario and a second scenario). In thefirst scenario, when a user needs to use a mobile terminal, the userneeds to turn on a screen of the mobile terminal, and in the secondscenario, when the user stops using the mobile terminal, the user mayturn off the screen of the mobile terminal. To better understand thetechnical solutions of the embodiments of the present invention, thefollowing separately describes, by using the foregoing two scenarios asexamples, the method for controlling a screen of a mobile terminal inthe embodiments of the present invention.

In the first scenario, when the user needs to use the mobile terminal,the user needs to turn on the screen of the mobile terminal.

An embodiment of the present invention provides a method for controllinga screen of a mobile terminal. As shown in FIG. 4A and FIG. 4B, themethod may include the following steps.

S201. A mobile terminal obtains a current motion parameter of the mobileterminal.

For specific descriptions of S201, refer to the related descriptions ofS101, and details are not described herein again.

S202. The mobile terminal determines a current motion status of themobile terminal based on the motion parameter.

Optionally, the motion status may include a first motion state in whicha moving speed of the mobile terminal is A, a second motion state inWhich the moving speed of the mobile terminal is B, and a third motionstate in which the moving speed of the mobile terminal is C, whereA<B<C.

For example, assuming that the moving speed of the mobile terminal(namely, a speed of picking up, by a user, the mobile terminal) is Awhen the user picks up the mobile terminal when staying still, it may beconsidered that the mobile terminal is in the first motion state in thiscase. Assuming that the moving speed of the mobile terminal is B whenthe user picks up the mobile terminal when walking, it may be consideredthat the mobile terminal is in the second motion state in this case.Assuming that the moving speed of the mobile terminal is C when the userpicks up the mobile terminal when running, it may be considered that themobile terminal is in the third motion state in this case. In thisembodiment of the present invention, because different moving speeds(namely, the speeds of picking up, by the user, the mobile terminal) ofthe mobile terminal correspond to different motion states of the mobileterminal, the mobile terminal may determine, based on a current movingspeed of the mobile terminal, a motion state corresponding to the movingspeed.

Further, because the mobile terminal may determine, based on the motionparameter, a pick-up parameter threshold and a put-down parameterthreshold that correspond to the motion status of the mobile terminal,the pick-up parameter threshold and the put-down parameter threshold canbe determined more accurately, so as to more accurately determinewhether the mobile terminal is picked up or put down.

S203. The mobile terminal determines, based on the motion status, apick-up parameter threshold corresponding to the motion status.

In this embodiment of the present invention, when the mobile terminal indifferent motion states, pick-up parameter thresholds are different.Therefore, the mobile terminal may determine the corresponding pick-upparameter threshold based on the motion status of the mobile terminal.

A correspondence between the motion status of the mobile terminal andthe pick-up parameter threshold may be pre-stored in the mobileterminal. The pick-up parameter thresholds may be obtained afterstatistical analysis is performed on a plurality of pieces of experimentdata. For example, cases in which the mobile terminal is in differentmotion states may be simulated, motion parameters obtained when the userpicks up the mobile terminal in the different motion states areseparately determined, and statistical analysis is performed on data ofmotion parameters obtained after a plurality of experiments, to finallydetermine pick-up parameter thresholds corresponding to the differentmotion states of the mobile terminal. For example, the data of themotion parameters obtained after the plurality of experiments may beclassified based on the different motion states, an average value (whichmay be an arithmetic average value, a geometric average value, or thelike) of each category of motion parameters is calculated, and then theaverage value is used as the pick-up parameter threshold in thecorresponding motion state.

Optionally, Table 1 shows examples of the correspondence between themotion status of the mobile terminal and the pick-up parameter thresholdin this embodiment of the present invention.

TABLE 1 Motion status of the mobile terminal Pick-up parameter thresholdFirst motion state Pick-up parameter threshold 1 Second motion statePick-up parameter threshold 2 Third motion state Pick-up parameterthreshold 3

As shown in Table 1, the first motion state corresponds to the pick-upparameter threshold 1, the second motion state corresponds to thepick-up parameter threshold 2, and the third motion state corresponds tothe pick-up parameter threshold 3. In this embodiment of the presentinvention, the pick-up parameter threshold 1, the pick-up parameterthreshold 2, and the pick-up parameter threshold 3 are different.

S204. The mobile terminal determines whether the motion parameter meetsthe pick-up parameter threshold.

If the motion parameter does not meet the pick-up parameter threshold,step S205 is performed, or if the motion parameter meets the pick-upparameter threshold, step S209 is performed.

For specific descriptions of S204, refer to the related descriptions ofS102, and details are not described herein again.

S205. The mobile terminal determines Whether a screen of the mobileterminal is switched from being blocked to not being blocked.

If the mobile terminal determines that the screen of the mobile terminalis switched from being blocked to not being blocked, step S206 and stepS207 are performed, or if the mobile terminal determines that the screenof the mobile terminal is not switched from being blocked to not beingblocked, step S208 is performed.

S206. The mobile terminal adjusts the pick-up parameter threshold.

If the mobile terminal determines that the screen of the mobile terminalis switched from being blocked to not being blocked, it indicates thatthe user probably needs to use the mobile terminal. However, the currentmotion parameter of the mobile terminal does not meet the currentpick-up parameter threshold. In this case, to further improve accuracyof controlling the screen to be turned on, the current pick-up parameterthreshold can be adjusted appropriately. For example, a first anglerange in the current pick-up parameter threshold is increased, and/or afirst moving speed threshold in the current pick-up parameter thresholdis decreased, and/or a first moving height threshold in the currentpick-up parameter threshold is decreased.

S207. The mobile terminal determines whether the motion parameter meetsa pick-up parameter threshold obtained after the adjustment.

If the motion parameter does not meet the pick-up parameter thresholdobtained after the adjustment, step S208 is performed, or if the motionparameter meets the pick-up parameter threshold obtained after theadjustment, step S209 is performed.

S208. The mobile terminal determines whether the mobile terminal isswitched from not being held to being held.

If the mobile terminal determines that the mobile terminal is switchedfrom not being held to being held, step S209 is performed, or if themobile terminal determines that the mobile terminal is not switched fromnot being held to being held, step S201 is performed.

When the motion parameter of the mobile terminal does not meet thepick-up parameter threshold obtained after the adjustment, or the screenof the mobile terminal is not switched from being blocked to not beingblocked, to further improve accuracy of controlling the screen to beturned on, the mobile terminal may further determine whether the mobileterminal is switched from not being held to being held, to determinewhether the user needs to use the mobile terminal. If the mobileterminal determines that the mobile terminal is switched from not beingheld to being held, it indicates that the user probably needs to use themobile terminal, and step S209 is performed, or if the mobile terminaldetermines that the mobile terminal is not switched from not being heldto being held, it indicates that the user probably does not need to usethe mobile terminal, and step S201 is performed.

Specifically, a method for determining, by the mobile terminal, that themobile terminal is switched from not being held to being held mayinclude the following steps.

S208 a. The mobile terminal obtains at least two sensing parametervalues.

The at least two sensing parameter values are used to determine whetherthe mobile terminal is held. The at least two sensing parameter valuesmay be obtained by using at least two sensing units disposed in themobile terminal. The at least two sensing units may be disposed on twosides of a rear face of the mobile terminal. Specifically, the at leasttwo sensing units owe described in detail in the following embodiment.

S208 b. The mobile terminal calculates an eigenvalue of the at least twosensing parameter values based on the at least two sensing parametervalues.

It should be noted that the eigenvalue may be a standard deviation or avariance, or may be another eigenvalue that may be used to determinewhether the mobile terminal is held. Specifically, a type of theeigenvalue may be determined based on an actual case, and this is notlimited in this embodiment of the present invention.

S208 c. When the eigenvalue is greater than or equal to a holdingdecision threshold, and the eigenvalue obtained after previouscalculation is less than the holding decision threshold, determine thatthe mobile terminal is switched from not being held to being held.

Optionally, the mobile terminal may obtain the foregoing at least twosensing parameter values in real time, calculate the eigenvalue of theat least two sensing parameter values in real time, and determine arelationship between the eigenvalue and the holding decision thresholdin real time.

It should be noted that when the eigenvalue is greater than or equal tothe holding decision threshold, it may be determined that the mobileterminal is held, or when the eigenvalue is less than the holdingdecision threshold, it may be determined that the mobile terminal is notheld. Therefore, it may be determined whether the eigenvalue is greaterthan or equal to the holding decision threshold, to determine whetherthe mobile terminal is held, so that when the eigenvalue is greater thanor equal to the holding decision threshold, and the eigenvalue obtainedafter previous calculation is less than the holding decision threshold(that is, a relationship between the eigenvalue obtained after currentcalculation and the holding decision threshold is different from arelationship between the eigenvalue obtained after previous calculationand the holding decision threshold, for example, the eigenvalue obtainedafter previous calculation is less than the holding decision threshold,and the eigenvalue obtained after current calculation is greater than orequal to the holding decision threshold), it is determined that themobile terminal is switched from not being held to being held.

For hardware implementation of the method for determining whether themobile terminal is held, as shown in FIG. 5, a plurality of sensingunits may be separately disposed at intervals on the two sides of therear face of the mobile terminal (when two sensing units are disposed inthe mobile terminal, one sensing unit may be disposed on each of the twosides of the rear face of the mobile terminal). The sensing unit in thisembodiment of the present invention may be specifically implemented byusing a capacitive sensor.

It should be noted that a specific quantity of sensing units disposed inthe mobile terminal in this embodiment of the present invention may beset based on a size of the mobile terminal and a requirement foraccuracy of determining whether the mobile terminal is held. Forexample, when more sensing units are disposed in the mobile terminal,accuracy of determining whether the mobile terminal is held is higher.However, because a sensing unit needs to be integrated into the mobileterminal, a limitation caused by the size of the mobile terminal on thequantity of sensing units needs to be considered.

The following describes the method for determining whether the mobileterminal is held in this embodiment of the present invention by using anexample in which four capacitive sensors are disposed on each of the twosides of the rear face of the mobile terminal, that is, eight capacitivesensors are disposed in total.

In an actual application scenario, when the user holds the mobileterminal by using a hand, contact between the hand and the mobileterminal usually is uneven. Therefore, eight capacitances detected bythe eight capacitive sensors differ relatively greatly, and aneigenvalue obtained through calculation based on the eight capacitancesis relatively large. When a non-hand substance touches the mobileterminal, contact between the substance and the mobile terminal usuallyis even. Therefore, eight capacitances detected by the eight capacitiveholding sensors differ relatively slightly, and an eigenvalue obtainedthrough calculation based on the eight capacitances is relatively small.Therefore, in this embodiment of the present invention, the capacitancesdetected by the eight capacitive sensors may be obtained to calculatethe eigenvalue, and then it is learned, by determining whether theeigenvalue is greater than or equal to the preset holding decisionthreshold, whether the mobile terminal is held.

In this embodiment of the present invention, holding mainly means thatthe mobile terminal is held by the hand of the user.

The preset holding decision threshold may be obtained after statisticalanalysis is performed on a plurality of pieces of experiment data. Forexample, a case in which a non-hand substance touches the mobileterminal may be simulated, and a plurality of experiment measurementsand calculations are performed to obtain a plurality of groups ofeigenvalues. A case in which the mobile terminal is held by the hand ofthe user is simulated, and a plurality of experiment measurements andcalculations are performed to obtain a plurality of groups ofeigenvalues. Then, normal distribution fitting is performed on theplurality of groups of eigenvalues obtained in the two cases, todetermine an eigenvalue corresponding to an intersection point of normaldistribution images in the two cases, and use the eigenvalue as theholding decision threshold. For example, as shown in FIG. 6, a dashedline shows a normal distribution diagram of the plurality of groups ofeigenvalues obtained when the case in which the non-hand substancetouches the mobile terminal is simulated, a solid line shows a normaldistribution diagram of the plurality of groups of eigenvalues obtainedwhen the case in which the mobile terminal is held by the hand of theuser is simulated, and an eigenvalue (represented as N in FIG. 6)corresponding to an intersection point (represented as M in FIG. 6) ofthe two normal distribution diagrams is the holding decision threshold.

S209. The mobile terminal determines whether the screen of the mobileterminal is blocked.

If the mobile terminal determines that the screen of the mobile terminalis not blocked, steps S210 to S212 are performed, or if the mobileterminal determines that the screen of the mobile terminal is blocked,step S201 is performed.

When the motion parameter meets the pick-up parameter threshold, tofurther improve accuracy of determining that the mobile terminal ispicked up, it may be further determined whether the screen of the mobileterminal is blocked. If the screen of the mobile terminal is notblocked, it indicates that the user probably needs to use the mobileterminal, and it is determined that the mobile terminal is picked up, orif the screen of the mobile terminal is blocked, it indicates that theuser probably does not need to use the mobile terminal, step S201 isperformed.

S210. The mobile terminal determines that the mobile terminal is pickedup.

S211. The mobile terminal obtains a sight line parameter of a user.

For specific descriptions of S211, refer to the related descriptions ofS104, and details are not described herein again.

S212. The mobile terminal determines whether a visual center of the useris on the screen of the mobile terminal.

If it is determined that the visual center of the user is on the screenof the mobile terminal and the screen of the mobile terminal is in anoff state, step S213 is performed, or if it is determined that thevisual center of the user is not on the screen of the mobile terminal,step S201 is performed.

S213. The mobile terminal switches the screen of the mobile terminal toan on state.

In the method for controlling a screen of a mobile terminal in thisembodiment of the present invention, the mobile terminal obtains thecurrent motion parameter of the mobile terminal, determines whether themotion parameter meets the pick-up parameter threshold, determines, whenthe motion parameter meets the pick-up parameter threshold, that themobile terminal is picked up, obtains the sight line parameter of theuser, and switches the screen to the on state when determining that thevisual center of the user is on the screen of the mobile terminal andthe screen is in the off state. In other words, in this embodiment ofthe present invention, it may be determined, based on the motionparameter of the mobile terminal, whether the mobile terminal is pickedup by the user, and it may be further determined, by using the sightline parameter, whether the visual center of the user is on the screen,so that it may be accurately determined whether the user needs to usethe mobile terminal, to accurately control the screen of the mobileterminal to be in the on state. Therefore, accuracy of controlling thescreen of the mobile terminal to be turned on can be improved.

In the second scenario, when the user stops using the mobile terminal,the user may turn off the screen of the mobile terminal.

An embodiment of the present invention provides a method for controllinga screen of a mobile terminal. As shown in FIG. 7A and FIG. 7B, themethod includes the following steps.

S301. A mobile terminal obtains a current motion parameter of the mobileterminal.

For specific descriptions of S301, refer to the related descriptions ofS101, and details are not described herein again.

S302. The mobile terminal determines a current motion status of themobile terminal based on the motion parameter.

Optionally, the motion status may include a first motion state in whicha moving speed of the mobile terminal is A, a second motion state inwhich the moving speed of the mobile terminal is B, and a third motionstate in which the moving speed of the mobile terminal is C, whereA<B<C.

For example, assuming that the moving speed of the mobile terminal(namely, a speed of putting down, by a user, the mobile terminal) is Awhen the user puts down the mobile terminal when staying still, it maybe considered that the mobile terminal is in the first motion state inthis case. Assuming that the moving speed of the mobile terminal is Bwhen the user puts down the mobile terminal. When walking, it may beconsidered that the mobile terminal is in the second motion state inthis case. Assuming that the moving speed of the mobile terminal is Cwhen the user puts down the mobile terminal when running, it may beconsidered that the mobile terminal is in the third motion state in thiscase. In this embodiment of the present invention, because differentmoving speeds (namely, the speeds of putting down, by the user, themobile terminal) of the mobile terminal correspond to different motionstates of the mobile terminal, the mobile terminal may determine, basedon a current moving speed of the mobile terminal, a motion statecorresponding to the moving speed.

S303. The mobile terminal determines, based on the motion status, aput-down parameter threshold corresponding to the motion status.

In this embodiment of the present invention, when the mobile terminal isin different motion states, put-down parameter thresholds are different.Therefore, the mobile terminal may determine the corresponding put-downparameter threshold based on the motion status of the mobile terminal.

A correspondence between the motion status of the mobile terminal andthe put-down parameter threshold may be pre-stored in the mobileterminal. The put-down parameter thresholds may be obtained afterstatistical analysis is performed on a plurality of pieces of experimentdata. For example, cases in which the mobile terminal is in differentmotion states may be simulated, motion parameters obtained when the userputs down the mobile terminal in the different motion states areseparately determined, and statistical analysis is performed on data ofthe motion parameters obtained after a plurality of experiments, tofinally determine put-down parameter thresholds corresponding to thedifferent motion states of the mobile terminal. For example, the data ofthe motion parameters obtained after the plurality of experiments may beclassified based on the different motion states, an average value (whichmay be an arithmetic average value, a geometric average value, or thelike) of each category of motion parameters is calculated, and then theaverage value is used as the put-down parameter threshold in thecorresponding motion state.

Optionally, Table 2 shows examples of the correspondence between themotion status of the mobile terminal and the put-down parameterthreshold in this embodiment of the present invention.

TABLE 2 Motion status of the mobile terminal Put-down parameterthreshold First motion state Put-down parameter threshold 1 Secondmotion state Put-down parameter threshold 2 Third motion state Put-downparameter threshold 3

As shown in Table 2, the first motion state corresponds to the put-downparameter threshold 1, the second motion state corresponds to theput-down parameter threshold 2, and the third motion state correspondsto the put-down parameter threshold 3. In this embodiment of the presentinvention, the put-down parameter threshold 1, the put-down parameterthreshold 2, and the put-down parameter threshold 3 are different.

S304. The mobile terminal determines whether the motion parameter meetsthe put-down parameter threshold.

If the motion parameter does not meet the put-down parameter threshold,step S305 is performed, or if the motion parameter meets the put-downparameter threshold, step S309 is performed.

For specific descriptions of S304, refer to the related descriptions ofS102, and details are not described herein again.

S305. The mobile terminal determines whether the mobile terminal isswitched from being held to not being held.

If the mobile terminal determines that the mobile terminal is switchedfrom being held to not being held, step S306 is performed, or if themobile terminal determines that the mobile terminal is not switched frombeing held to not being held, step S301 is performed.

When the motion parameter of the mobile terminal does not meet theput-down parameter threshold, to further improve accuracy of controllinga screen to be turned off, the mobile terminal may further determinewhether the mobile terminal is switched from being held to not beingheld, to determine whether the user stops using the mobile terminal. Ifthe mobile terminal determines that the mobile terminal is switched frombeing held to not being held, it indicates that the user probably stopsusing the mobile terminal, and step S306 is performed, or if the mobileterminal determines that the mobile terminal is not switched from beingheld to not being held, it indicates that the user probably does notstop using the mobile terminal, and step S301 is performed.

Specifically, a method for determining, by the mobile terminal, that themobile terminal is switched from being held to not being held may beimplemented by replacing, with S208 d, S208 c in the method fordetermining, by the mobile terminal, that the mobile terminal isswitched from not being held to being held, that is, S208 a to S208 c.

S208 d. When the eigenvalue of the at least two sensing parameter valuesthat is obtained through calculation is less than a holding decisionthreshold, and the eigenvalue obtained after previous calculation isgreater than or equal to the holding decision threshold, determine thatthe mobile terminal is switched from being held to not being held.

In this embodiment, after the mobile terminal calculates the eigenvalueof the at least two sensing parameter values according to the method ofS208 a and S208 b, the mobile terminal may determine, when theeigenvalue is less than the holding decision threshold and theeigenvalue obtained after previous calculation is greater than or equalto the holding decision threshold (that is, a relationship between theeigenvalue obtained after current calculation and the holding decisionthreshold is different from a relationship between the eigenvalueobtained after previous calculation and the holding decision threshold,for example, the eigenvalue obtained after previous calculation isgreater than or equal to the holding decision threshold, and theeigenvalue obtained after current calculation is less than the holdingdecision threshold), that the mobile terminal is switched from beingheld to not being held.

For specific hardware implementation of the method for determiningwhether the mobile terminal is held, as shown in FIG. 5, refer to thecorresponding descriptions of S208.

S306. The mobile terminal determines that the mobile terminal is putdown.

S307. The mobile terminal determines whether a screen of the mobileterminal is blocked.

If the mobile terminal determines that the screen of the mobile terminalis not blocked, step S308 is performed, or if the mobile terminaldetermines that the screen of the mobile terminal is blocked, step S313is performed.

In the method for controlling a screen of a mobile terminal in thisembodiment of this application, after it is determined that the mobileterminal is put down, to further improve accuracy of controlling thescreen to be turned off and reduce power consumption, it may bedetermined whether the screen of the mobile terminal is blocked, andwhen it is determined that the screen of the mobile terminal is blocked,it may be determined that the user does not need to use the mobileterminal, and the screen of the mobile terminal is directly switched toan off state without a need to obtain a sight line parameter of theuser.

S308. The mobile terminal obtains a sight line parameter of a user.

For specific descriptions of S308, refer to the related descriptions ofS104, and details are not described herein again.

S309. The mobile terminal determines whether a visual center of the useris on the screen of the mobile terminal.

If it is determined that the visual center of the user is not on thescreen of the mobile terminal and the screen of the mobile terminal isin an on state, step S310 is performed, or if it is determined that thevisual center of the user is on the screen of the mobile terminal, stepS301 is performed.

S310. The mobile terminal switches the screen of the mobile terminal toa dimmed state.

In this embodiment of the present invention, after switching the screenof the mobile terminal to the dimmed state, the mobile terminal mayperform step S311.

S311. The mobile terminal obtains a sight line parameter of the user.

For specific descriptions of S311, refer to the related descriptions ofS104, and details are not described herein again.

S312. The mobile terminal determines whether the visual center of theuser is on the screen of the mobile terminal within a preset hysteresistime.

If it is determined that the visual center of the user is constantly noton the screen of the mobile terminal within the preset hysteresis time,step S313 is performed after the hysteresis time, or if it is determinedthat the visual center of the user is back on the screen of the mobileterminal within the preset hysteresis time, step S314 is performed.

S31:3. The mobile terminal switches the screen of the mobile terminal toan off state.

S314. The mobile terminal switches the screen of the mobile terminal toan on state.

In this embodiment of the present invention, when the screen of themobile terminal needs to be switched from the on state to the off state,to further improve accuracy of controlling the screen of the mobileterminal to be turned off, the screen of the mobile terminal first maybe switched to the dimmed state, and remain in the dimmed state for thepreset hysteresis time, and the sight line parameter of the user may beconstantly obtained within the preset hysteresis time. If it isdetermined that the visual center of the user is constantly not on thescreen of the mobile terminal within the preset hysteresis time, thescreen of the mobile terminal is switched from the dimmed state to theoff state after the preset hysteresis time, or if it is determined thatthe visual center of the user is back on the screen of the mobileterminal within the preset hysteresis time, the screen of the mobileterminal is switched from the dimmed state to the on state.

In the method for controlling a screen of a mobile terminal in thisembodiment of the present invention, the mobile terminal obtains thecurrent motion parameter of the mobile terminal, determines whether themotion parameter meets the put-down parameter threshold, determines,when the motion parameter meets the put-down parameter threshold, thatthe mobile terminal is put down, obtains the sight line parameter of theuser, and switches the screen to the off state when determining that thevisual center of the user is not on the screen and the screen is in theon state. In other words, in this embodiment of the present invention,it may be determined, based on a motion status parameter of the mobileterminal, whether the mobile terminal is put down by the user, and itmay be further determined, by using the sight line parameter, whetherthe visual center of the user is on the screen, so that it may beaccurately determined whether the user stops using the mobile terminal,to accurately control the screen of the mobile terminal to be in the offstate. Therefore, accuracy of controlling the screen of the mobileterminal to be fumed off can be improved.

The foregoing method embodiments mainly describe the solutions of theembodiments of the present invention from the perspective of the mobileterminal. It may be understood that, to implement the foregoingfunctions, the mobile terminal includes a corresponding hardwarestructure and/or software module for performing the functions. A personof ordinary skill in the art should be easily aware that, the units andalgorithm steps in the examples described with reference to theembodiments disclosed in this specification may be implemented byhardware or a combination of hardware and computer software in thepresent invention. Whether the functions are performed by hardware orcomputer software driving hardware depends on particular applicationsand design constraint conditions of the technical solutions. A personskilled in the art may use different methods to implement the describedfunctions for each particular application, but it should not beconsidered that the implementation goes beyond the scope of the presentinvention.

In the embodiments of the present invention, the mobile terminal may bedivided into functional modules according to the method embodiments. Forexample, each functional module may be obtained through division basedon a corresponding function, or two or more functions may be integratedinto one processing module. The integrated module may be implemented ina form of hardware, or may be implemented in a form of a functionalmodule of software. It should be noted that the module division in theembodiments of the present invention is an example, and is merelylogical function division. There may be another division manner in anactual implementation.

For example, when functional modules are obtained through division byusing corresponding functions, a schematic structural diagram of amobile terminal provided in an embodiment of the present invention isshown in FIG. 8. In FIG. 8, the mobile terminal includes an obtainingmodule 21, a determining module 22, and a switching module 23.

The obtaining module 21 is configured to support the mobile terminal inperforming S101, S104, and S107 in the method process shown in FIG. 3 inthe method embodiment, performing S201 and S211 in the method processshown in FIG. 4A and FIG. 4B in the method embodiment, and performingS301, S308, and S311 in the method process shown in FIG. 7A and FIG. 7Bin the method embodiment.

The determining module 22 is configured to support the mobile terminalin performing S102, S103, and S106 in the method process shown in FIG. 3in the method embodiment, performing S202, S203, S204, S205, S207, S208,S209, S210, and S212 in the method process shown in FIG. 4A and FIG. 4Bin the method embodiment, and performing S302, S303, S304, S305, S306,S307, S309, and S312 in the method process shown in FIG. 7A and FIG. 7Bin the method embodiment.

The switching module 23 is configured to support the mobile terminal inperforming S105 and S108 in the method process shown in FIG. 3 in themethod embodiment, performing S213 in the method process shown in FIG.4B in the method embodiment, and performing S310, S313, and S314 in themethod process shown in FIG. 7B in the method embodiment.

Optionally, with reference to FIG. 8, as shown in FIG. 9, the mobileterminal provided in this embodiment of the present invention mayfurther include an adjustment module 24. The adjustment module 24 isconfigured to support the mobile terminal in performing S206 in themethod process shown in FIG. 4A in the method embodiment.

The obtaining module 21, the determining module 22, the switching module23, and the adjustment module 24 may be further configured to performother processes of the technology described in this specification.

It should be noted that, all related content of each step in theforegoing method embodiments may be cited in function descriptions of acorresponding functional module. Details are not described herein again.

For example, when an integrated unit is used, a schematic structuraldiagram of a mobile terminal provided in an embodiment of the presentinvention is shown in FIG. 10. In FIG. 10, the mobile terminal includesa processing module 31 and a communications module 32. The processingmodule 31 is configured to control and manage actions of the mobileterminal. For example, the processing module 31 is configured to supportthe mobile terminal in performing the steps performed by the determiningmodule 22, the switching module 23, and the adjustment module 24, and/orperform other processes of the technology described in thisspecification. The communications module 32 is configured to support themobile terminal in interacting with a user, for example, thecommunications module 32 is configured to support the mobile terminal inperforming the step performed by the obtaining module 21, and/or isconfigured to perform other processes of the technology described inthis specification. As shown in FIG. 10, the mobile terminal may furtherinclude a storage module 33 and a bus 34, to store program code and dataof the mobile terminal.

The processing module 31 may be a processor or controller of the mobileterminal. The processor or controller may be the processor 11 in thesmartphone shown in FIG. 2. The processor or controller may implement orexecute logical block diagrams, modules, and circuits in variousexamples described with reference to the content disclosed in thepresent invention. The processor or controller may be a centralprocessing unit (central processing unit, CPU), a general purposeprocessor, a digital signal processor (digital signal processor, DSP),an application-specific integrated circuit (application-specificintegrated circuit, ASIC), a field programmable gate array (fieldprogrammable gate array, FPGA) or another programmable logic device, atransistor logic device, a hardware component, or any combinationthereof. The processor or controller may implement or execute variousexamples of logical blocks, modules, and circuits that are describedwith reference to the content disclosed in the present invention. Theprocessor may also be a combination of computing functions, for example,a combination including one or more microprocessors or a combination ofa DSP and a microprocessor.

The communications module 32 may be a transceiver, a transceivercircuit, a communications interface, or the like of the mobile terminal.The transceiver, the transceiver circuit, the communications interface,or the like may be the RF circuit 12 in the smartphone in the figure.

The storage module 33 may be a memory and the like of the mobileterminal, and the memory may be the memory 14 in the smartphone in theforegoing figure. The memory 33 may include a volatile memory (volatilememory) such as a random access memory (random access memory, RAM), orthe memory 33 may include a non-volatile memory (non-volatile memory)such as a read-only memory (read-only memory, ROM), a flash memory(flash memory), a hard disk drive (hard disk drive, HDD), or asolid-state drive (solid-state drive, SSD), or the memory 33 may includea combination of the foregoing types of memories.

The bus 34 may be a peripheral component interconnect (peripheralcomponent interconnect, PCI) bus, an extended industry standardarchitecture (extended industry standard architecture. EISA) bus, or thelike. The bus 34 may be classified into an address bus, a data bus, acontrol bus, or the like. For ease of indication, the bus is indicatedby using only one bold line in FIG. 10. However, it does not indicatethat there is only one bus or only one type of bus.

Certainly, the mobile terminal in this embodiment may further includeother components in the smartphone in FIG. 2, and details are notdescribed herein again.

Optionally, based on FIG. 2, the mobile terminal provided in thisembodiment of the present invention may further include various sensorsused in the process of executing the method for controlling a screen ofa mobile terminal in the embodiments of the present invention. Forexample, the sensors may include a barometer sensor, an accelerationsensor, an optical sensor, a capacitive sensor, and the like.

The barometer sensor is configured to detect an atmospheric pressure,and a moving height of the mobile terminal may be determined by usingthe atmospheric pressure.

The acceleration sensor may measure an acceleration value caused due togravity, and an inclination angle of the mobile terminal relative to ahorizontal plane may be calculated based on the acceleration value. Amoving speed of the mobile terminal may be calculated by using a changeof the acceleration value.

In this embodiment of the present invention, a motion parameter of themobile terminal may be obtained by using the barometer sensor and theacceleration sensor.

The optical sensor may include a proximity optical sensor and a lightsensor. The proximity optical sensor is configured to detect whether anobject approaches or touches the mobile terminal, and detect whether ascreen of the mobile terminal is blocked by an object. The light sensoris configured to detect ambient light namely, luminance of ambient lightin an environment in which the mobile terminal is located. To bespecific, in this embodiment of the present invention, the opticalsensor may be used to detect whether the screen of the mobile terminalis blocked by an object.

The capacitive sensor may generate a capacitive increment when the userholds the mobile terminal by using a hand. To be specific, in thisembodiment of the present invention, the capacitive sensor may be usedto detect whether the mobile terminal is held.

For example, in this embodiment of the present invention, with referenceto the system architecture of the Android operating system in FIG. 1,the processor of the mobile terminal in this embodiment of the presentinvention may be further configured to drive, at the kernel layer of thesystem architecture, the barometer sensor, the acceleration sensor, theoptical sensor, the capacitive sensor, and the like, to perform datacollection. In addition, the processor may be further configured toperform corresponding steps in the method embodiments based on thecollected data.

An embodiment of the present invention provides a computer readablestorage medium. The computer readable storage medium stores one or moreprograms. The one or more programs include a computer executioninstruction. When the processor of the mobile terminal executes thecomputer execution instruction, the mobile terminal performs the methodfor controlling a screen of a mobile terminal in the method embodiments.For the specific method for controlling a screen of a mobile terminal,refer to the related descriptions in the method embodiments, and detailsare not described herein again.

The methods or algorithm steps described with reference to the contentdisclosed in the present invention may be implemented in a hardwaremanner, or may be implemented in a manner of executing a softwareinstruction by a processor. The software instruction may include acorresponding software module. The software module may be stored in aRAM, a flash memory, a ROM, an erasable programmable read-only memoryerasable programmable ROM, EPROM), an electrically erasable programmableread-only memory (electrically EPROM, EEPROM), a register, a hard disk,a removable hard disk, a compact disc read-only memory (CD-ROM), or astorage medium in any other forms well-known in the art. A storagemedium used as an example is coupled to the processor, so that theprocessor can read information from the storage medium, and can writeinformation into the storage medium. Certainly, the storage medium maybe a part of the processor. The processor and the storage medium may belocated in an ASIC.

The foregoing descriptions of implementations allow a person skilled inthe art to clearly understand that, for the purpose of convenient andbrief description, only division of the foregoing functional modules isused as an example for illustration. In actual application, theforegoing functions may be allocated to different modules andimplemented according to a requirement, that is, an inner structure ofan apparatus is divided into different functional modules to implementall or a part of the functions described above. For a specific workingprocess of the foregoing system, apparatus, and unit, refer to acorresponding process in the foregoing method embodiments, and detailsare not described herein again.

In the several embodiments provided in this application, it should beunderstood that the disclosed system, apparatus, and method may beimplemented in other manners. For example, the described apparatusembodiment is only an example. For example, the module or unit divisionis only logical function division and may be other division in actualimplementation. For example, a plurality of units or components may becombined or integrated into another system, or some features may beignored or not performed. In addition, the displayed or discussed mutualcouplings or direct couplings or communication connections may beimplemented by using some interfaces. The indirect couplings orcommunication connections between the apparatuses or units may beimplemented in electrical, mechanical, or other forms.

The units described as separate parts may or may not be physicallyseparate, and parts displayed as units may or may not be physical units,may be located in one position, or may be distributed on a plurality ofnetwork units. Some or all of the units may be selected according toactual needs to achieve the objectives of the solutions of theembodiments.

In addition, functional units in the embodiments of the presentinvention may be integrated into one processing unit, or each of theunits may exist alone physically, or two or more units are integratedinto one unit. The integrated unit may be implemented in a form ofhardware, or may be implemented in a form of a software functional unit.

When the integrated unit is implemented in the form of a softwarefunctional unit and sold or used as an independent product, theintegrated unit may be stored in a computer-readable storage medium.Based on such an understanding, the technical solutions of the presentinvention essentially, or the part contributing to the prior art, or allor a part of the technical solutions may be implemented in the form of asoftware product. The computer software product is stored in a storagemedium and includes several instructions for instructing a computerdevice (which may be a personal computer, a server, a network device, orthe like) or a processor to perform all or a part of the steps of themethods described in the embodiments of the present invention. Theforegoing storage medium includes: any medium that can store programcode, for example, a flash memory, a removable hard disk, a read-onlymemory, a random access memory, a magnetic disk, or an optical disc.

The foregoing descriptions are only specific implementations of thepresent invention, but are not intended to limit the protection scope ofthe present invention. Any variation or replacement readily figured outby a person skilled in the art within the technical scope disclosed inthe present invention shall fall within the protection scope of thepresent invention. Therefore, the protection scope of the presentinvention shall be subject to the protection scope of the claims.

What is claimed is:
 1. A method for controlling a screen of a mobileterminal, comprising: obtaining a motion parameter of the mobileterminal when the screen is in an off state; determining that the motionparameter indicates that the mobile terminal is picked up when thescreen is in the off state; obtaining a sight line parameter of a userafter the mobile terminal is picked up and when the screen is in the offstate; determining that the sight line parameter of the user indicatesthat a visual center of the user is on the screen by obtaining the sightline parameter of the user within a preset time after the mobileterminal is picked up; and switching the screen from the off state to anon state when the visual center of the user is on the screen within thepreset time after the mobile terminal is picked up.
 2. The method ofclaim 1, wherein the motion parameter corresponds to a speed of themobile terminal.
 3. The method of claim 2, further comprising: comparingthe speed of the mobile terminal to a threshold; and determining thatthe mobile terminal is picked up when the speed of the mobile terminalexceeds the threshold.
 4. The method of claim 1, wherein the motionparameter corresponds to a moving height of the mobile terminal.
 5. Themethod of claim 4, further comprising: comparing the moving height ofthe mobile terminal to a threshold; and determining that the mobileterminal is picked up when the moving height of the mobile terminalexceeds the threshold.
 6. The method of claim 1, wherein the motionparameter corresponds to an angle of the mobile terminal.
 7. The methodof claim 6, further comprising: comparing the angle of the mobileterminal to a threshold; and determining that the mobile terminal ispicked up when the angle exceeds the threshold.
 8. The method of claim6, wherein the angle of the mobile terminal comprises an angle between aplane of the screen and a plane of eyes of the user.
 9. A mobileterminal, comprising: a processor; a screen coupled to the processor;and a memory coupled to the processor, wherein the memory is configuredto store instructions that, when executed by the processor, cause themobile terminal to: detect that the mobile terminal is picked up whenthe screen is in an off state; detect that a visual center of a user ison the screen when the screen is in the off state by obtaining a sightline parameter of the user within a preset time after the mobileterminal is picked up; and switch the screen from the off state to an onstate when the visual center of the user is on the screen within thepreset time after the mobile terminal is picked up.
 10. The mobileterminal of claim 9, further comprising a sensor coupled to theprocessor and configured to detect a speed of the mobile terminal,wherein the processor is configured to determine that the mobileterminal is picked up when the speed of the mobile terminal exceeds athreshold.
 11. The mobile terminal of claim 9, further comprising asensor coupled to the processor and configured to detect a moving heightof the mobile terminal, wherein the processor is configured to determinethat the mobile terminal is picked up when the moving height of themobile terminal exceeds a threshold.
 12. The mobile terminal of claim 9,further comprising a sensor coupled to the processor and configured todetect an angle of the mobile terminal, wherein the processor isconfigured to determine that the mobile terminal is picked up when theangle of the mobile terminal exceeds a threshold.
 13. The mobileterminal of claim 12, wherein the angle of the mobile terminal comprisesan angle between a plane of the screen and a plane of eyes of the user.14. The mobile terminal of claim 9, further comprising a camera coupledto the processor, wherein the camera is configured to obtain an image ofthe user, and wherein the processor is configured to analyze the imageof the user to determine the visual center of the user.
 15. The mobileterminal of claim 14, wherein the visual center of the user is based oneye tracking of the user.
 16. The mobile terminal of claim 14, whereinthe visual center of the user is based on analyzing a facial image ofthe user.